[Kernel][Apr 26] Perseus

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mrakifa

Senior Member
Mar 26, 2011
1,028
180
Google Pixel 6a
Google Pixel 7 Pro
ebumady4.jpg

Monster! Thank you for this!
Sent from my SAMSUNG-SGH-I317 using Tapatalk 2
 

otisman

Senior Member
May 12, 2012
2,440
3,029
Kill batt life bradahs this helps batt life overclock your phone im on the second day with my note2 and only charge it once. Much alohas :thumbup:

Sent from my SAMSUNG-SGH-I317 using Xparent Red Tapatalk 2
 
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rayandreas

Senior Member
Oct 11, 2011
904
600
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bakersfield ca
Anyone knoe where i can read to learn how to install kernel for this phone?

theres 2 files. one is a tar. flash with odin. or use the cwm file and just flash it in recovery. nothing fancy.

so, put the cwm kernel on your sd card and get into recovery. either on clockworkmod or twrp.both work. once in recovery find the kernel and install. that's it. you now have an awesome kernel my friend!
 
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mkr14

Senior Member
Dec 25, 2010
105
7
Anyone knoe where i can read to learn how to install kernel for this phone?


First read how to root it in this thread : http://xdaforums.com/showthread.php?t=1980644 ( Decide if you want to use Triangle Away -it describes why you use it)

Then read how to and install TWRP : http://xdaforums.com/showthread.php?t=1981198

You can flash the kernel zip (Original post in this thread. File with .zip on the end and Perseus in the name) using TWRP recovery very easy with minimal complication. You will want to read and understand how to use it but it is as simple as this:

Make sure you have the kernel zip on your SDcard. Boot into recovery. Press install, browse to your kernel zip on the sdcard, select it. It should complete the install. Done. reboot. Verify the kernel installed in settings > about. You are now using the new kernel.

That should be it.
 
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9wire

Senior Member
Jul 19, 2009
1,197
419
I used a LOT of kernels since my old dx, this is running nicely, zero issues.
 

marcbsmoove

Senior Member
Feb 26, 2011
435
54
I've tried installing this kernel 3 times using twrp and it says successful install bit when I check it in about phone,It's not there. When I open up setcpu it's still at 1600......no option to overclock higher. What am I doin wrong? Please help! Thanks to all that reply.

G-Nizzle 2 4 Shizzle
 

suprstar29

Senior Member
Feb 17, 2012
174
91
Is the Zip flashable in TWRP? (I know some are only scripted for CWM). Answer=yes. I flashed in TWRP with no problems.

Also, has anybody flashed this yet? I am going to try it, but don't want to be the first! (Edit: I see blkghost is).

Has anybody that flashed it noticed if it eliminates the lag waking the phone from deep sleep? This is what I intend to test first on the kernel. Edit: nope

i am having issues with lag when waking the device
 

Scott

Retired Recognized Developer

yas1987

Senior Member
Jun 5, 2011
96
31
Btw what software are you guys using to overclock the GPU?

Thanks, working great so far
 
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glitchsys

Senior Member
May 3, 2006
212
67
Sacramento
Faster USB charging, Undervolting and Overclocking

"USB charging rate limit increased to 900mA."

This means it'll charge faster when plugged into a computer's USB port? Assuming the computers USB port can put out 900mA and not the standard 500mA?

Also I've never really undervolted but I've overclocked in the past. If I undervolt the CPU too low, I imagine all sorts of issues will crop up, including not booting. I assume I could just go back into recovery and reflash the kernel and it'll revert to normal right? Also if I undervolt, I've been told it'll increase battery power (which would be insane considering how awesome the battery is on this phone already), but will it affect your ability to overclock? I mean, can you undervolt + overclock within reason without losing stability? Or does overclocking require more power, thus combining that with undervolting be a bad idea.
 

9wire

Senior Member
Jul 19, 2009
1,197
419
I'm oc'ed to 1.7, and undervolted -50 across the board, except the lowest 2. No issues. Battery I can't say, I'm on the phone so much I hve to charge during the day no matter what. It certainly isn't worse, anyway.
 

yas1987

Senior Member
Jun 5, 2011
96
31
I'm oc'ed to 1.7, and undervolted -50 across the board, except the lowest 2. No issues. Battery I can't say, I'm on the phone so much I hve to charge during the day no matter what. It certainly isn't worse, anyway.

What i did instead was leave the 1704 volt the same, and even the 1500, and everything else till 200mhz undervolted by 50, this way you get best of both words, when your doing something intensive it kicks up to 1700 without any undervolting and when its idling at 200 , or just not using much power its undervolted. hope that makes sense
 

Apo11on

Senior Member
Sep 5, 2008
1,668
336
San Diego, CA
great job

Here is what impressive phone and quality kernel can do for you:
 

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  • 176
    This is a direct port of my kernel on the international I9300 Galaxy S3 and sidekick to the international N7100/5 Note 2 kernels.

    Recap of features:
    • CPU overclocking up to 1.8GHz and undervolting from 600mV to 1400mV.
    • GPU overclocking and undervolting.
    • GPU scaling reworked.
    • Screen sharpness and colour modifications.
    • Extended Pegasusq and improved Performance governors.
    • Removed Touch Booster and replaced with custom Flexrate mechanic.
    • Improved scheduler power management for improved idle residencies on auxiliary CPUs.
    • USB charging rate limit increased to 900mA.

    This is supposed to be merely a proxy thread. Please refer to the N7100/5 thread for full changelogs, explanations, bug-reports and other issues. Kernel for specific device versions will be posted here.

    This kernel is for the North American AT&T variant SGH-i317 and Canadian SGH-i317m for Rogers, Telus, Bell, and SaskTel. Versions for other variants are found in their respective forums.
    22
    STWEAKS PROFILES! and proper bootloop fix.

    Alright! now that Perseus Kernel .28 is out we have a new added feature that lets us implement override profiles!

    What does this mean?
    Well now this UNCHECK SET ON BOOT zip will actually just update your current default.profile and uncheck the set on boot options.
    Which makes it the best fix for a bootloop, because you can then go back in to your old settings that failed and modify them.

    I also am going to be generating 5 profiles. (will edit this post)
    Each more aggressive overclocking and undervolting.
    For people who are unsure of how to do do this properly with Stweaks,
    You can just flash any of my profiles.
    I recommend you download them all start at 5 and flash, if you bootloop or crash move up a profile until your stable!

    Profile 5G is the one I run everyday (and is the lowest values for voltages)
    It also is 200-1800 mhz overclocked and gpu 160-640 mhz
    My custom governor tweaks (I believe the cpu is too aggressive and also the cores dont respond as much as id like to see them responding, 1 core on idle, 4 cores when needed.)

    Profile 5 is the one I run everyday (and is the lowest values for voltages)
    It also is 200-1800 mhz overclocked and gpu 160-640 mhz
    STOCK governor settings

    Profile 4 is slightly less aggressive on the voltages
    200-1800 mhz 160-640

    Profile 3 is slightly less aggressive on the voltage curve
    200-1800mhz 160-533

    Profile 2 is slightly less aggressive on the voltage curve
    200-1600mhz 160-533

    Profile 1 is slightly less aggressive on the voltage curve
    200-1600mhz 160-533

    Profile 0 is the DEFAULT profile the kernel came with. (it just deletes your profile and rebuilds it so its safe for all versions inlcuding S3-i9000)

    EDIT: I have also included a zip with just the governor tweaks, these will not alter your voltages on cpu/gpu and will not change your max cpu

    custom governor tweaks detailed below:
    here is my logic

    defaults parameter mine
    30000 sampling rate 20000
    82 up threshold 90
    5 down diff 10
    40% thres for response 81
    1200 freq for fast down 1600
    95 up thres fast down 98
    37 up step 18
    6 splice amount 4
    13 down diff 8

    With the default settings when the load is measured if the cpu load is over 82% off current freq step it will scale up.
    New logic added in perseus .27 now gives us 3 up steps instead of just a fixed one.
    so your cpu will step up more aggressively based on how much above the threshold it is, not just if its over, this is
    great.

    Right now, if we are coming in with a
    load of 83%-88% we increase freq by 300mHz
    if we are 89-94% we increase freq by 400 mHz and
    if we are 94-100% then we increase freq by 700 mHz.
    This is too fast for me.
    For a few reasons the main one being that the amount we jump has gone up because our max cpu is 1800 instead of 1600 (at 1600 the jump ups are 200,300,600mhz)

    The logic I use on my N2 is as follows:
    Load of 90-94 = 100 mhz jump
    load of 95-98 = 200 mhz jump
    load of 99-100 = 400 mhz jump

    The responsiveness of the phone is not compromised at all, the cpu just steps up less and only when it has really high loads.
    It still gets to 1800 and does many operations there, but it comes out of 1800 fast and when it jumps down it jumps down further.
    The fastdown has been upped from 1200 to 1600 , meaning it now requires 98% or higher load to jump up when above 1600 mhz not 1200 mhz, I found that the CPU was always in 1800 or like way lower,
    never in the 1700 - 1200 range as it used to need 95% load to be in that range.
    The cores hotplug has been slightly changed to turn off cores quicker when not in use and takes more samples to turn them on so they only turn on if load exists for longer duration of time.

    PLEASE NOTE
    Flashing any of these zips OTHER THEN THE UNCHECK SET ON BOOT will REMOVE your STWEAKS settings and replace them with the profile. PLEASE back up your profile if you want to save it.
    Where is it?
    /data/.perseus/default.profile << back this guy up. rename to default.profile2 works. or copy to sdcard.

    Due to the way that these changes are applied (at initial boot) it will take longer then usual to display the boot animation for the first boot after changing profile.
    This also means that you cannot flash 2 of these files in one boot, for example profile 3 and the governor tweaks.
    You would need to flash the governor tweaks or the profile first and then reboot, and then flash the other.
    11
    Re: [Kernel][Feb 26] Perseus

    White looks a little red ish. Not sure if it's just me.

    Sent from my SGH-I317 using Tapatalk 2

    There were some setting that someone over in the other Perseus thread posted and they help subdue the redish tint.

    I'll see if I can find them and post back here.

    OK here is what the settings were:

    In the screen settings enable register hook and enable master sequence. don't change anything else. Go down to chroma saturation weight and change the gains as following:

    red gain=5
    green gain=5
    blue gain=10
    yellow gain=5
    cyan gain=7
    magenta gain =7

    then go down to white colour balance
    red in white= -13
    green in white = -15
    blue in white= +7

    If you like them give tainka a thanks.

    Sent from Mars
    9
    great to see an OC kernel

    hope it continues to evolve and improve... and maybe i'll see a better way to alter GPU other than scouring the forum for scripts...
    You will have a configuration app within a few days.
    8
    Updated to 31.2; same changes as on the S3:

    Samsung's fix for the sudden death syndrome (SDS) included. It is caused by eMMC failure on phones with VTU00M 16GB internal memory chips with revision 0xF1. You can check your phone with the "eMMC Brickbug Check" in the Play Store (Ignore the message if it says you're not affected, the type and revision is what matters). The patch is a firmware soft-patch that is applied on every boot and MMC resume, it is not a permanent fix. You will need to stay forever on kernels which include the patch, this also includes updated recoveries and their embedded kernels.

    I also removed the stock kernels from the first post as they are outdated and dangerous.